Home / 124,878,378.32-172,311,603.72-78,435,550.16

Finding the Fourth Proportional to 124,878,378.32, 172,311,603.72 and 78,435,550.16

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Solution

The fourth proportional to 124,878,378.32, 172,311,603.72 and 78,435,550.16 is: 108,228,146.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,878,378.32 : 172,311,603.72 = 78,435,550.16 : x
  2. Step 2: Convert to fraction form
    124,878,378.32/172,311,603.72 = 78,435,550.16/x
  3. Step 3: Cross multiply
    124,878,378.32x = 172,311,603.72 × 78,435,550.16
  4. Step 4: Simplify right side
    124,878,378.32x = 13,515,355,436,730,102
  5. Step 5: Solve for x
    x = 13,515,355,436,730,102/124,878,378.32
  6. Step 6: Final answer
    x = 108,228,146.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.